Journal
POLYMERS
Volume 15, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/polym15204153
Keywords
cyclopolymerization; conjugated copolymers; iodine adsorption; heavy metal ion adsorption; environmental remediation
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In this study, three conjugated copolymers TPP1-3 were successfully synthesized, and their excellent iodine adsorption capacity and nickel ion capture efficiency were confirmed.
The synthesis of three conjugated copolymers TPP1-3 was carried out using a palladium-catalyzed [3+2] cycloaddition polymerization of 1,6-dibromopyrene with various dialkynyl thiophene derivatives 3a-c. The target copolymers were obtained in excellent yields and high purity, as confirmed by instrumental analyses. TPP1-3 were found to divulge a conspicuous iodine adsorption capacity up to 3900 mg g-1, whereas the adsorption mechanism studies revealed a pseudo-second-order kinetic model. Furthermore, recyclability tests of TPP3, the copolymer which revealed the maximum iodine uptake, disclosed its efficient regeneration even after numerous adsorption-desorption cycles. Interestingly, the target copolymers proved promising nickel ions capture efficiencies from water with a maximum equilibrium adsorption capacity (qe) of 48.5 mg g-1.
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